In the question, a part of the sentence might have an error, Find out which part of the sentence has an error. If a sentence is free from error, choose ‘No error’ as your answer.
My teacher (1) did not object (2) to using me calculator. (3) No error (4)
‘Using’ is a gerund and the pronoun 'me' should be used before it.
Hence, the correct sentence would be My teacher did not object to me using the calculator.